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March 2, 1901


JAMA. 1901;XXXVI(9):576-577. doi:10.1001/jama.1901.02470090040006

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The knowledge that pure air is a potent agent in the cure, as well as in the prevention, of pulmonary tuberculosis is not a discovery of recent date, but it is only within the last quarter of the nineteenth century that the principle has been systematically applied. The fact must never be lost sight of that the tubercle bacillus is not the sole, though withal the specific, etiologic factor in the development of tuberculosis. The nebulous condition comprehended in the designation "susceptibility" constitutes only a less important factor. This may be inherited or acquired. It is best counteracted by hygienic measures and by improvement in the general nutrition; and these ends are best attained through a life in the open air and suitable dietetic regulations. It has been thought in the past that the first of these objects especially could be secured only at certain altitudes above sea-level and under

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